WO2004083690A1 - シリンダーヘッド用メタルガスケット - Google Patents
シリンダーヘッド用メタルガスケット Download PDFInfo
- Publication number
- WO2004083690A1 WO2004083690A1 PCT/JP2004/003609 JP2004003609W WO2004083690A1 WO 2004083690 A1 WO2004083690 A1 WO 2004083690A1 JP 2004003609 W JP2004003609 W JP 2004003609W WO 2004083690 A1 WO2004083690 A1 WO 2004083690A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- cylinder
- metal
- bead
- annular bead
- cooling water
- Prior art date
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/02—Sealings between relatively-stationary surfaces
- F16J15/06—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces
- F16J15/08—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with exclusively metal packing
- F16J15/0818—Flat gaskets
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/02—Sealings between relatively-stationary surfaces
- F16J15/06—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces
- F16J15/08—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with exclusively metal packing
- F16J15/0818—Flat gaskets
- F16J15/0825—Flat gaskets laminated
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/02—Sealings between relatively-stationary surfaces
- F16J15/06—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces
- F16J15/08—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with exclusively metal packing
- F16J15/0818—Flat gaskets
- F16J2015/085—Flat gaskets without fold over
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/02—Sealings between relatively-stationary surfaces
- F16J15/06—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces
- F16J15/08—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with exclusively metal packing
- F16J15/0818—Flat gaskets
- F16J2015/0862—Flat gaskets with a bore ring
Definitions
- the present invention relates to a cylinder head metal gasket interposed between a cylinder block and a cylinder head of an internal combustion engine.
- each of the substrates comprises: a cylinder hole formed corresponding to each cylinder bore of a cylinder block of an internal combustion engine; a chevron-shaped cross-sectional annular bead formed around each cylinder hole; A cooling water jacket formed in the outer periphery of each of the annular beads corresponding to a cooling water jacket of the cylinder block and a cooling water hole of the cylinder head;
- a metal gasket having a cylinder hole and a cooling water hole similar to that described above is known, and in such a metal gasket, a sub-plate is provided with an annular bead around each cylinder hole of a substrate.
- a stepped structure SI in which the outer portion 3b and the outer portion 3b are joined by laser welding is known (see, for example, Japanese Patent Application Laid-Open No. H7-243535, FIG. 3).
- reference numeral 1 indicates a meta ⁇ / gasket
- LW indicates a laser weld.
- the sub-plate 3 made of a thin steel plate (SUS301H0.It, etc.) having a single thickness interposed between two substrates 2 made of steel plates
- a shim plate 4 made of a thin steel plate (such as SUS301H0.It) is also superimposed on the cylinder hole perimeter 3a overlapping the annular bead 2b around each cylinder hole 2a so that the required step is obtained.
- a stepped structure S2 in which the sub plate 3 and the shim plate 4 are joined by laser welding (for example, see Japanese Patent Application Laid-Open No. 10-61772).
- sub plate 3 consisting of a single thickness of steel sheets interposed two between the substrates 2 each of which is made of a steel plate (SUS 301H 0. 0 5 t like), the substrate
- a stepped structure S3 in which a folded portion 3c is formed by folding back at a peripheral portion 3a of the cylinder hole overlapping with the annular bead 2b around each cylinder hole 2a of 2 so that a required step is formed
- Japanese Patent Application Laid-Open No. 8-121597, FIG. 4 Japanese Patent Application Laid-Open No. 8-121597, FIG. 4).
- the thickness of the shim plate 4 is the amount of step, and the thickness of the industrially distributed thin steel sheet is 50 ⁇ (0.05 mm) at present.
- the thickness of the industrially distributed thin steel sheet is 50 ⁇ (0.05 mm) at present.
- a dedicated alignment jig and a high-precision laser welding device are indispensable, and gaskets will be expensive. There was a problem.
- the second step structure S2 since a single-thick thin] plate is folded back and bent, the thickness of the thin steel plate becomes the amount of step, so the second step structure S2 In the same way as above, it is not possible to set a highly accurate level difference in units of ⁇ ⁇ ⁇ (0.01 ⁇ ⁇ ), and since the folding force is performed by drawing, the shape of the folded portion 3c is free. There is a problem that it is difficult to form the folded portion 3c having a low degree and having a sufficiently large radial width without cracking, particularly with a thin steel plate.
- a metal gasket 1 including a rubber layer 5 as a surface sealing layer made of NBR, fluorine rubber, silicon rubber, or the like for example, see Japanese Patent Application Laid-Open No. 2-38760, attached drawings).
- a substrate 2 made of a thin metal plate, and a graphite powder, molybdenum disulfide powder or the like, which is applied on both surfaces of the substrate 2 and covers the entire surface of the substrate 2
- a metal gasket 1 having a solid lubricant layer 6 as a surface seal layer formed by mixing a small amount of a binder (resin or rubber) with a metal gasket 1 (for example, see Japanese Patent Application Laid-Open No. 5-17773). No. 7).
- a cylinder-to-cylinder metal gasket according to a first aspect of the present invention has an object to solve the above problems advantageously and to provide an excellent metal gasket that is inexpensive and has a high degree of freedom in controlling the amount of step.
- the cylinder-to-cylinder metal gasket according to the first embodiment is made of a metal plate, and has a cylinder hole formed corresponding to each cylinder pore of the cylinder block of the internal combustion engine; An annular bead having a chevron-shaped cross-section formed around each cylinder hole, and an outside of each annular bead corresponding to a cooling water jacket of a cylinder block of the internal combustion engine and a cooling water hole of a cylinder head.
- the annular bead also extends from a radially inward position to a radially outward position so as to overlap with the annular bead and face the top of the annular bead, and annularly surround each of the cylinder holes of the substrate. It comprises a hard metal plating layer and
- the hard metal plating layer formed on at least one surface of the sub-plate interposed between the two substrates overlaps with each annular bead of the substrate.
- the annular bead also extends from the radially inner position to the radially outer position so as to face the top of the annular bead, and a step structure is formed by annularly surrounding each cylinder hole of the substrate. Therefore, when the linear pressure applied to the top of the annular bead of the two substrates is increased, it is possible to exhibit high see-through performance against the combustion gas pressure in the cylinder pore.
- the sub-plate may be formed with an annular bead having a chevron-shaped cross-section so as to overlap with the annular bead of the substrate and to have the top portions facing each other.
- annular beads overlap in three stages, higher sealing performance can be obtained.
- the metal gasket of the present invention is formed of a metal plate, and has a cylinder hole formed corresponding to each cylinder bore of the cylinder block of the internal combustion engine, and a chevron-shaped cross-section formed around each cylinder hole.
- the respective cylinder one hole of the substrate is made of comprises a a hard metal plated layer surrounding annularly. According to the cylinder-head metal gasket, the hard metal plating layer formed on one or both of the two substrates, the surface facing the other substrate, is connected to each annular bead of the substrate.
- a stepped structure that overlaps and extends from a position radially inward of the annular bead to a position radially outward of the annular bead so as to face the top of the annular bead, and annularly surrounds each of the cylinder holes in the substrate. Therefore, even with a two-piece metal gasket, high linear pressure applied to the top of the annular bead of the two boards can exhibit high sealing performance against the combustion gas pressure in the cylinder bore. .
- the hard metal plating layer is made of metal, it is possible to maintain high sealing performance as a step structure particularly for an annular bead around a cylinder hole exposed to high heat, Also, a hard metal plating layer is formed by a plating process. Since the thickness can be easily adjusted, it is possible to easily obtain a step amount that optimizes the balance of the tightening force between the annular bead and the outer bead.
- the hard metal plating layer is preferably made of nickel, nickel phosphorus, or copper, and has a hardness of HV 60 or more. This is because it is possible to withstand the high linear pressure applied to the top of the annular bead of the two substrates without being crushed, and to prevent a decrease in sealing performance.
- the distribution of the step amount of the hard metal plating layer with respect to the plurality of cylinder holes corresponds to the rigidity distribution of the internal combustion engine with respect to the plurality of cylinder bores.
- the reason for this is that the seal performance can be balanced by increasing the level difference in the part with low IJ property of the internal combustion engine as compared with the part with high rigidity.
- the metal gasket for a cylinder head according to the second aspect of the present invention also advantageously solves the above-mentioned problems, and has an object to provide an excellent metal gasket that is inexpensive and has a high degree of freedom in controlling the amount of step.
- the cylinder-to-cylinder metal gasket according to the second aspect is made of a metal plate, and has a cylinder hole formed corresponding to each cylinder bore of the cylinder block of the internal combustion engine; An annular bead having a chevron-shaped cross section formed around each cylinder hole; a cooling water jacket and a cylinder of the cylinder block of the internal combustion engine; A cooling water hole formed in the outer peripheral portion of the cooling water hole, and an outer peripheral bead having a single-slope cross-sectional shape formed at a position entirely surrounding the annular bead and the cooling water hole.
- a substrate comprising a metal plate, a sub-plate interposed between the two substrates, and adhered on at least one surface of the sub-plate,
- the annular bead also extends from a radially inward position to a radially outward position so as to overlap with each annular bead and face the top of the annular bead, and annularly open each of the cylinder holes of the substrate.
- a metal foil layer made of a surrounding metal foil, and an adhesive layer made of an adhesive for bonding the metal foil to the sub-plate while being pressed at least.
- a metal foil layer made of a metal foil pressed and bonded to at least one surface of a sub-plate interposed between two substrates is formed from an adhesive bonding the metal foil layer.
- the annular bead extends from a radially inward position to a radially outward position so as to overlap with each annular bead of the substrate and face the top of the annular bead. Since a stepped structure is formed by annularly surrounding each cylinder hole of the substrate, a high linear pressure applied to the top of the annular bead of the two substrates increases the sealing performance against the combustion gas pressure in the cylinder bore. Can be demonstrated.
- the adhesive forming the adhesive layer adheres the metal foil to the sub-plate while being pressed at least, so that the adhesive is pressed to flow under the metal foil or beneath the metal foil.
- the sub-plate may be formed with an annular bead having a chevron-shaped cross-section so as to overlap with the annular bead of the substrate and to have the top portions facing each other.
- annular beads overlap in three stages, higher sealing performance can be obtained.
- the bonding of the metal foil may be performed before or after the formation of the annular bead, but it is preferable to perform the bonding before the formation, since the metal foil accurately follows the annular bead.
- the metal gasket of the present invention is formed of a metal plate, and has a cylinder hole formed corresponding to each cylinder pore of a cylinder block of an internal combustion engine, and a chevron section formed around the cylinder hole.
- An annular bead having a shape, a cooling water hole formed in an outer peripheral portion of each of the annular beads corresponding to a cooling water jacket of a cylinder block and a cooling water hole of a cylinder head of the internal combustion engine, and the annular bead.
- a single beveled cross-sectional outer peripheral bead formed at a position surrounding the cooling water hole as a whole, two substrates superimposed on each other, and one or both of the two substrates Affixed to a surface facing the other substrate, It extends from a position radially inward from the annular bead to a position radially outward from the annular bead so as to overlap with the annular bead and face the top of the annular bead.
- a metal foil layer made of a metal foil that surrounds in an annular shape; and an adhesive layer made of an adhesive that bonds the metal foil to the sub-plate at least while being pressed.
- a metal foil layer composed of a metal foil pressed and bonded to one or both of the two substrates, the surface facing the other substrate, is used as an adhesive for bonding the two substrates.
- each of the annular beads overlaps with each annular bead of the substrate, and the annular bead moves from the radially inward position to the radially outward position so as to face the top of the annular bead. Extends to form a stepped structure by surrounding each cylinder hole of the substrate in a ring shape, so even with a two-piece metal gasket, the linear pressure applied to the top of the ring bead of the two substrates increases, and the cylinder pressure increases.
- the adhesive forming the adhesive layer adheres the metal foil to the sub-plate at least while being pressed, so that the adhesive is pressed to flow under the metal foil or to be pressed under the metal foil.
- the step structure can be easily made to have a desired thickness, and a step amount that optimizes the balance of the tightening force between the annular bead and the outer bead can be easily obtained.
- the metal foil in the present invention is preferably made of aluminum, an aluminum alloy, steel, stainless steel, bronze, titanium, or nickel, and has a hardness of Hv 60 or more. Strong metal foil has high heat resistance, is hard to break, and easily retains its shape. / Is easy.
- the adhesive in the adhesive layer according to the present invention is preferably made of phenol, epoxy, polyimide, or a mixture of at least two of these. Such adhesives have high heat resistance.
- a metal gasket for a cylinder head according to a third aspect of the present invention advantageously solves the above-mentioned problems, and has a high sealability and a high heat resistance.
- the metal gasket for a cylinder head according to the third aspect is made of a metal plate, and corresponds to each cylinder bore of a cylinder block of an internal combustion engine.
- a cooling water hole formed at an outer peripheral portion of each of the annular beads corresponding to the hole; and an outer bead having a single-slope cross-sectional shape formed at a position surrounding the annular bead and the cooling water hole as a whole.
- at least two flexible substrates formed on at least outward surfaces of the two substrates and covering at least the respective annular beads. It is made of comprises a plane metal plated layer.
- a metal gasket of the present invention is formed of a metal plate, and has a cylinder hole formed corresponding to each cylinder bore of a cylinder block of an internal combustion engine, and a chevron section formed around the cylinder hole.
- An annular bead having a shape, and a cooling water hole formed in an outer peripheral portion of each of the annular beads corresponding to a cooling water jacket of a cylinder block of the internal combustion engine and a cooling water hole of a cylinder head.
- a soft surface metal plating layer covering the annular bead.
- a soft surface metal coating is formed on the outward surface (one surface if one) of one or two substrates to cover at least each annular bead. Since the layer acts as a surface sealing layer, it fills in fine scratches and processing marks on the deck surface of the cylinder block and cylinder head, and performs the function of micro-seal, thus exhibiting high sealing performance.
- the soft surface metal-coated layer is made of metal, high heat resistance can be exhibited particularly in an annular bead around a cylinder hole exposed to high heat.
- the soft metal plating layer is preferably composed of one or more layers of tin, copper, silver or an alloy thereof, and has a surface hardness of Hv 60 or less. If the surface hardness is low, it is easy to fill in fine scratches and marks on the deck surface.
- the thickness of the soft surface metal-plated layer is not less than 3 im and not more than 40 ⁇ m. If it is less than 3 ⁇ m, the fine scratches and processing marks on the deck surface cannot be sufficiently filled, and if it exceeds 40, the sealability will not improve much.
- FIG. 1 is a plan view showing an entire first embodiment of a metal gasket for a cylinder and a head according to a first embodiment of the present invention.
- FIG. 2 is a cross-sectional view of the metal gasket of the first embodiment, taken along A— of FIG.
- FIGS. 3A and 3B are explanatory diagrams showing a method of providing a hard metal plating layer on the sub-plate of the metal gasket of the first embodiment.
- FIG. 4 is a cross-sectional view of a fifth embodiment of the metal gasket for a cylinder head of the present invention at the same position as in FIG.
- FIG. 5 is a sectional view of the thirty-eighth embodiment of the metal gasket for a cylinder head according to the present invention at the same position as in FIG.
- FIG. 6 is a sectional view of the thirty-ninth embodiment of the metal gasket for a cylinder head according to the present invention at the same position as in FIG.
- FIG. 7 is a sectional view of a 40th embodiment of the cylinder-to-cylinder metal gasket of the present invention at the same position as in FIG.
- FIG. 8 is a cross-sectional view of a 41st embodiment of the metal gasket for a cylinder head according to the present invention, at the same position as in FIG.
- FIG. 9 shows the measurement of the seal limit pressure of the metal gasket 1 of the above embodiment and the comparative example. It is explanatory drawing which shows a method.
- FIGS. 10 (a) to (d) are explanatory diagrams respectively showing the sealing performance of a comparative example having no step structure and an example of the present invention.
- FIGS. 11 (a) to 11 (c) are explanatory diagrams respectively showing the sealing performance of the comparative example having no step structure and the comparative example in which the material of the metal plating layer is different, and the example of the present invention. is there.
- FIGS. 12 (a) to 12 (d) are explanatory diagrams respectively showing the sealing performance of the comparative example in which the step amount is uniform and the embodiment of the present invention.
- FIGS. 13 (a) to 13 (d) are explanatory diagrams respectively showing the sealing performance of a comparative example in which the step amount is uniform and the embodiment of the present invention.
- FIG. 14 is a cross-sectional view of the metal gasket according to the first embodiment of the second embodiment of the present invention, taken along line AA of FIG.
- FIGS. 15A to 15C are explanatory views showing a method of providing a resin layer on the sub plate of the metal gasket of the first embodiment.
- FIG. 16 is a cross-sectional view of the second embodiment of the metal gasket for a cylinder head according to the present invention, at the same position as in FIG.
- FIG. 17 is a cross-sectional view of the ninth embodiment of the metal gasket for a cylinder head according to the present invention at the same position as in FIG.
- FIG. 18 is a cross-sectional view of the tenth embodiment of the cylinder-to-cylinder metal gasket of the present invention at the same position as in FIG.
- FIG. 19 is an explanatory diagram comparing the sealing performance after thermal degradation of the embodiment of the present invention and the comparative example in which the material of the metal foil layer is different.
- FIGS. 20 (a) and (b) are cross-sectional views of one substrate taken along line AA and line BB in FIG.
- FIG. 21 is an enlarged cross-sectional view showing a substrate and a soft surface metal plating layer of a metal gasket according to an embodiment of the third aspect of the present invention.
- FIG. 22 is an enlarged sectional view showing a substrate and a soft surface metal plating layer of another embodiment of the metal gasket for a cylinder head according to the present invention.
- Figures 23 (a) and (b) are a plan view and a half sectional view showing the shape and dimensions of the gasket test piece.
- FIG. 24 is a cross-sectional view showing an outline of the seal test apparatus.
- FIG. 25 is an explanatory diagram showing the results of performing the above-described seal test on the test specimens 1 to 3 and Comparative Example 1 shown in Table 1.
- FIG. 26 is an explanatory diagram showing the results of the above-mentioned seal test performed on the test specimens 1 to 8 and Comparative Example 1 shown in Table 2.
- FIG. 27 is a cross-sectional view showing an outline of the thermal degradation test apparatus.
- Fig. 28 is an explanatory diagram showing the results of the above-mentioned thermal degradation test and seal test performed on specimens 1 and 2 and comparative examples 1 and 2 shown in Table 3.
- FIG. 29 is a cross-sectional view showing an example of a step structure of a conventional cylinder-to-cylinder metal gasket at a position similar to FIG.
- FIG. 30 is a cross-sectional view showing another example of the step structure of the conventional cylinder-to-head metal gasket at the same position as in FIG. 1.
- FIG. 31 is a cross-sectional view showing another example of the step structure of the conventional metal gasket for a cylinder and head at a position similar to FIG. 1.
- FIG. 33 is a cross-sectional view showing another example of the surface seal layer of the conventional cylinder head metal gasket. Best mode for carrying out the invention.
- FIG. 1 shows the metal for the cylinder head of the present invention.
- FIG. 2 is a plan view showing the entire gasket of the first embodiment
- FIG. 2 is a cross-sectional view taken along the line A--A of FIG. 1
- FIGS. 3 (a) and 3 (b) show the metal gasket of the first embodiment.
- It is explanatory drawing which shows the method of providing a hard metal plating layer in a subplate, and the same code
- the metal gasket 1 for the cylinder head of the first embodiment is
- each of the two substrates 2 here has four cylinder holes 2a formed corresponding to the four cylinder bores of the cylinder opening of the internal combustion engine (in FIG. 1, the left side).
- # 1, # 2, # 3, # 4 corresponding to the cylinder bores in order from the cylinder bore 2a
- a plurality of cooling water holes 2c formed on the outer peripheral portion of each annular bead 2b corresponding to the cooling water jacket of the cylinder mouth of the internal combustion engine and the cooling water holes of the cylinder head.
- the sub-plate 3 has a cylinder hole 3 d corresponding to each of the cylinder holes 2 a of the substrate 2 and some of the cooling water holes 2 c of the substrate 2. And a cooling water hole 3e corresponding to.
- the cylinder-to-cylinder metal gasket 1 of the first embodiment further has a total thickness of 49 to 51 ⁇ on both sides of the sub-plate 3 as shown in FIG. 2 (see Table 1 for details).
- the hard metal plating layer 5 of FIG. 3 is provided as shown in FIG. 3 (b).
- nickel (hardness HV 255) formed by, for example, an electroplating process or a hot-dip metal plating process around the perimeter of each cylinder hole 3d on both surfaces of the sub-plate 3
- it overlaps with each annular bead 2 b of the substrate 2 and faces radially outward from the annular bead 2 b so as to face the top of the annular bead 2 b.
- each of the cylinder holes 3d of the sub-plate 3 and the corresponding cylinder holes 2a of the corresponding substrate 2 are annularly surrounded.
- the hard metal-plated layers 5 formed on both surfaces of the sublayer 3 interposed between the two substrates 2 are connected to the respective annular beads 2 b of the substrate 2. It overlaps and extends from a position radially inward from the annular bead 2b to a position radially outward from the annular bead 2b so as to face the top of the annular bead 2b, and annularly surrounds each cylinder hole 2a of the substrate 2. Since the step structure S4 with a step amount of approximately 50 / m is configured, the linear pressure applied to the top of the annular bead 2b of the two substrates 2 increases, and as described later, the seal is high against the combustion gas pressure in the cylinder bore.
- the metal gasket 1 of the first embodiment since the hard metal plating layer 5 is formed of nickel, a high seal is formed as a step structure especially for the annular bead 2b around the cylinder hole 2a exposed to high heat. The performance can be maintained and the hard metal plating layer 5 is formed by the plating process, so that the thickness of the layer can be easily adjusted, so that the tightening force between the annular bead 2b and the outer bead 2d is obtained. It is possible to easily obtain the step amount that optimizes the balance between the two.
- the metal gasket 1 of the first embodiment since the two substrates 2 are each provided with a rubber coat for covering the outer surface of the steel plate with a rubber layer, the rubber layers are formed of a cylinder block and a rubber block. Sealing performance can be improved by filling the micro scratches and processing marks on the deck surface of the cylinder head and performing the function of micro sealing.
- the first sub-plate 3 is provided with a hard metal plating layer 5 of nickel on both sides of the flat sub-plate 3.
- a metal gasket for a cylinder head according to the present invention is the same configuration as that of the embodiment, except that the total thickness (step amount) of the hard metal plating layer 5 is uniformly set to 80 Aim for the four cylinder holes 2a.
- This is the second embodiment. According to the second embodiment, since the level difference is larger than that of the first embodiment, it is possible to exhibit a higher performance than the first embodiment, as described later.
- the total thickness (step amount) of the hard metal plating layers 5 The stiffness distribution of the internal combustion engine for the four cylinder pores of the engine is # 2, # 3, # 1, #
- the four cylinder holes 2a in order from the left are 49 // m, 8 lim, 79 ⁇ , and 50, um, respectively.
- a hard metal plating layer 5 of the hard metal plating layer 5 having the same configuration as that of the first embodiment having the Huckel hard metal plating layer 5 on both surfaces of the flat sub-plate 3 is used.
- the total thickness (step height) is set to correspond to the case where the rigidity distribution of the internal combustion engine with respect to the four cylinder pores of the internal combustion engine is lower than # 1 and # 4 in # 2 and # 3.
- FIG. 4 is a cross-sectional view of the fifth embodiment of the metal gasket for a cylinder head according to the present invention at the same position as that of FIG. 1.
- the metal gasket 1 of the second embodiment is a single-sided in formed on the upper surface) on, for example, by an electric-plating process or the molten metal plating step - hard metal nickel (hardness HV 2 5 5) having a thickness of 4 9 to 51 mu m (see Table 1 for details) Only the point that the step structure S5 having the step amount of about 50 ⁇ m including the plating layer 5 is different from that of the first embodiment, and the other points are the same as those of the first embodiment. Have been. According to the fifth embodiment, the same operation as the first embodiment is performed. Effect can be obtained.
- the thickness of the hard metal plating layer 5 (the amount of step) is four in the same configuration as that of the fifth embodiment in which the nickel secondary hard metal plating layer 5 is provided on one side of the flat sub-plate 3.
- Sixth and seventh embodiments of the cylinder head metal gasket of the present invention have a cylinder hole 2a of 80 zm and 100 / m, respectively. According to these sixth and seventh embodiments, since the step amount is larger than that of the fifth embodiment, higher sealing performance can be exhibited as compared with the fifth embodiment, as described later.
- the thickness (step amount) of the hard metal plating layer 5 In correspondence with the case where the rigidity distribution of the internal combustion engine with respect to the four cylinder bores of # 2 and # 3 is lower than # 1 and # 4, Fig. m, 82 / im, 83 ⁇ m, and 49 ⁇ m are referred to as an eighth embodiment of the cylinder head metal gasket of the present invention. Further, nickel hard metal is provided on one side of the flat sub plate 3.
- the thickness (step difference) of the hard metal plating layer 5 is changed according to the rigidity distribution of the internal combustion engine with respect to the four cylinder bores of the internal combustion engine.
- # 3 is lower than # 1 and # 4 in Fig. 3
- Fig. 1 And each 47 ⁇ , 105 m, what was 103 ⁇ ⁇ 50 ⁇ a ninth embodiment of the metal gasket for a cylinder head to the invention.
- the level difference corresponds to the rigidity distribution of the internal combustion engine, as described later, higher sealing performance can be exerted than the previous embodiment.
- the total thickness (step amount) of the hard metal plating layers 5 is Corresponding to the case where the stiffness distribution of the internal combustion engine with respect to the four cylinder bores of the internal combustion engine is lower than # 2 and # 3 at # 1, # 4, Fig. 1 shows the four cylinder bores 2a from left to right. 82 / zm, 49 urn 51 m, and 80 urn, respectively,
- the same configuration as the first embodiment having a hard metal plating layer 5 of nickel on both sides of the flat sub-plate 3 is adopted.
- the total thickness (step difference) of the hard metal-plated layer 5 corresponds to the case where the rigidity distribution of the internal combustion engine with respect to the four cylinder bores of the internal combustion engine is lower than # 2 and # 3 in # 1 and # 4.
- the four cylinder holes 2a in order from the left have 100 ⁇ , 50 rn, 50 / itn, and 100 ⁇ , respectively, which are the first embodiment of the methanol head gasket for cylinder head of the present invention.
- the step amount corresponds to the rigidity distribution of the internal combustion engine, higher sealing performance can be exhibited as compared with the previous embodiment, as described later.
- the thickness (step) of the hard metal plating layer 5 is the same as that of the fifth embodiment having the Huckel hard metal plating layer 5 on one side of the flat sub-plate 3.
- the Oka ij ⁇ raw distribution of the internal combustion engine for the four cylinder pores is lower than # 2 and # 3 at # 1, # 4, Fig. , 48 ⁇ m, 50 ⁇ m, and 81 / itn as the first and second embodiments of the metal gasket for a cylinder head of the present invention.
- a nickel hard metal plating layer was formed on one side of the flat sub-plate 3.
- the thickness of the hard metal plating layer 5 (the amount of step) is set so that the rigidity distribution of the internal combustion engine with respect to the four cylinder bores of the internal combustion engine is # 1, # 4.
- Fig. 1 shows four cylinders from left
- the holes 2a having a diameter of 103 / m, 49 / zm and 49 / m 102 ⁇ , respectively, are referred to as a thirteenth embodiment of a metal gasket for a cylinder head according to the present invention.
- the step amount corresponds to the rigidity distribution of the internal combustion engine, higher sealing performance can be exhibited as compared with the previous embodiment, as described later. .
- the same structure as that of the first to sixth and eighth to thirteenth embodiments, in which the hard metal plating layer 5 is made of nickel-phosphorus ( ⁇ 868) is used in the first to fourth embodiments
- the same configuration as the first to sixth and eighth to thirteenth embodiments is adopted as the twenty-fifth embodiment.
- the hard metal plating layer 5 made of copper (Hv95) is referred to as a 26th to 37th embodiment.
- FIG. 5 is a sectional view of a metal gasket for a cylinder head according to a thirty-eighth embodiment of the present invention at a position similar to that of FIG.
- an annular bead 3f having a chevron-shaped cross section is formed so that the annular bead 2b of the substrate 2 overlaps and the top of the annular bead 2b of the lower substrate 2 is opposed to the annular bead 2b.
- Thickness corresponding to the rigidity distribution of the internal combustion engine consisting of Eckel (hardness Hv255) formed by, for example, an electric plating process or a molten metal plating process on the 3f protruding side surface.
- a step structure S6 is provided with a hard metal plating layer 5 ⁇ m (see Table 1 for details). It has the same configuration. According to the thirty-eighth embodiment, since the annular beads 2b and 3f are overlapped in three stages, higher scenery performance can be obtained as compared with the eighth embodiment as described later.
- FIG. 6 is a sectional view of the thirty-ninth embodiment of the metal gasket for a cylinder head according to the present invention at the same position as in FIG.
- an annular bead 3f having an angled cross section is formed so that the annular bead 2b of the substrate 2 overlaps and the annular bead 2b of the lower substrate 2 and the top face each other.
- the total thickness of nickel (hardness Hv255) formed by the electroplating process and the molten metal plating process, corresponding to the Oka lj distribution of the internal combustion engine, is 47 to 83 ⁇ (see Table 1 for details).
- step structure S7 is provided with the hard metal plating layer 5 is different from that of the third embodiment described above, and the other configuration is the same as that of the third embodiment. According to the thirty-ninth embodiment, since the annular beads 2b and 3f overlap in three stages, higher sealing performance can be obtained than in the third embodiment.
- FIG. 7 is a cross-sectional view of the fourth embodiment of the metal gasket for a cylinder head according to the present invention at the same position as that of FIG. 1.
- the metal gasket 1 of the 40th embodiment has two sheets.
- Sub-plate 3 is not provided between substrates 2, but each substrate 2 itself is the same as in the previous embodiment. belongs to.
- the Oka I ⁇ distribution of the internal combustion engine is set on the surface (inner surface) of the substrate 2 on one side (upper side in the figure) facing the other substrate (lower side board in the figure) 2.
- a hard metal plating layer 5 having a thickness of 49 to 82 ⁇ (see Table 1 for details) is provided.
- the molten metal formed by the process of attaching molten metal hardness Hv255).
- the stepped structure S8 extends from a position radially inward to a position radially outward from the annular bead 2b so as to face the top of the bead 2b, and surrounds each cylinder hole 2a of the substrate 2 in a ring shape to form a stepped structure S8. Things.
- the gasket can be manufactured at a low cost because there is no sub plate 3, and as described later, it is possible to obtain substantially the same sealing performance as the first embodiment. it can.
- FIG. 8 is a cross-sectional view of the 41st embodiment of the metal gasket for a cylinder head according to the present invention at the same position as that of FIG. 1.
- the metal gasket 1 of the 41st embodiment has two sheets. Although there is no sub-plate 3 between the substrates 2, each substrate 2 itself is the same as in the previous embodiment.
- a total thickness of 51 to 82 / i ra (see Table 1) corresponding to the rigidity distribution of the internal combustion engine is provided on the surface (inner surface) of both substrates 2 facing the other substrate 2.
- a hard metal plating layer 5 is provided.
- the hard metal plating layer 5 is formed by a nickel (hardness) formed by an electric plating process or a molten metal plating process around the cylinder hole 2a of the base plate 2. HV 2 5), and when the two substrates 2 are superimposed, the annular beads 2 b overlap with each annular bead 2 b of the other substrate 2 and face the top of the annular bead 2 b. Also extends from the radially inner position to the radially outer position, and annularly surrounds each of the cylinder holes 2a of the substrate 2 to form a step structure S9.
- the gasket can be manufactured at a low cost because there is no sub-plate 3, and as described later, the seal is substantially the same as that of the third embodiment. Performance can be obtained.
- Tables 1 to 5 below show the metal gaskets of the first embodiment to the 41st embodiment, the metal gasket of the comparative example 1 in which the hard metal plating layer 5 was removed from the first embodiment, and the first embodiment.
- the same level difference as in the example was obtained by the butt joint in FIG. 14, and the metal gasket of Comparative Example 2 and the soft metal layer made of tin (H vl 5) instead of the hard metal plating layer 5 of the first embodiment.
- the metal gasket of Comparative Example 3 provided with an adhering layer, and the metal gasket of Comparative Example 4 in which the same step amount of about 50 zm was obtained by the butt joint of FIG.
- FIGS. 10 (a) to 10 (d) show the seal limit pressure for each cylinder (cylinder bore) of Comparative Example 1 having no step structure and the first, fifth and seventh embodiments, respectively. It is also seen from this figure that the metal gasket of the above embodiment has a significantly improved sealing property as compared with the metal gasket having no step structure.
- Figs. 11 (a) to 11 (c) show the seal limit for each cylinder (cylinder bore) between Comparative Example 1 having no step structure and Comparative Example 3 having a soft metal plating layer and the first embodiment. It is an explanatory view showing the pressure, and it can be seen from this figure that the metal gasket of the above embodiment has improved sealing properties as compared with the metal gasket having a soft metal plating layer.
- Figures 12 (a) to 12 (d) show a comparative example 2 in which the step distribution is uniform when the stiffness distribution of the internal combustion engine is lower than the # 2 and # 3 cylinder bores for the # 1 and # 4 cylinder bores.
- Figures 13 (a) to 13 (d) show a comparative example 2 of uniform step difference applied when the rigidity distribution of the internal combustion engine is lower than that of # 1, # 4 cylinder bores for # 2, # 3 cylinder bores.
- the cylinder (cylinder pore) differs from that of the third, eighth, and ninth embodiments in that the step difference is larger around the cylinder hole corresponding to the # 2, # 3 cylinder pores than around the other cylinder holes. It is an explanatory view showing the seal limit pressure, respectively, and it can be seen from this figure that the metal gasket of the above embodiment has significantly improved sealing properties as compared with a metal gasket having a uniform level difference.
- FIG. 1 is a plan view showing the entire first embodiment of the metal gasket for a cylinder head according to the present invention
- FIG. 14 is a cross-sectional view along the A--A spring in FIG. 1
- FIG. (C) to (c) are explanatory views showing a method of providing a metal foil layer on the sub-plate of the metal gasket of the first embodiment, in which parts similar to those shown in FIGS. Is denoted by the same reference numeral. That is, reference numeral 1 denotes a metal gasket, 2 denotes a substrate, and 3 denotes a subplate.
- the metal gasket 1 for the cylinder head of the first embodiment has a rubber coating of a rubber layer made of NBR having a thickness of 25 zm only on the outer surface (the surface facing the cylinder block and the cylinder head).
- a rubber coating of a rubber layer made of NBR having a thickness of 25 zm only on the outer surface (the surface facing the cylinder block and the cylinder head).
- two substrates 2 made of steel sheet (SUS 301H 0.2t) coated with steel and superimposed on each other, and a steel plate without rubber coating (SUS 301H 0.2t) interposed between these two substrates And the auxiliary plate 3.
- each of the two substrates 2 has a plurality of cylinder holes 2a formed respectively corresponding to a plurality of cylinder pores of a cylinder opening of the internal combustion engine, and each cylinder hole 2a.
- Each annular bead 2b corresponding to a cooling water jacket of a cylinder block of the internal combustion engine and a cooling water hole of a cylinder head formed in the above-mentioned internal combustion engine.
- a plurality of cooling water holes 2c formed in the outer peripheral portion of each of the plurality of annular beads 2b and a plurality of cooling water holes 2c located therearound.
- the outer peripheral bead 2d has a cross-sectional shape (so-called half bead shape).
- the sub-plate 3 includes a cylinder hole 3d corresponding to each of the cylinder holes 2a of the substrate 2 and a number of cooling water holes 2c of the substrate 2. And a cooling water hole 3e corresponding to the crab.
- the methanol gasket for cylinder head 1 of the first embodiment further includes a metal foil layer 5 having a thickness of 50 zm on one side (the upper side in the figure) of the sub-plate 3. This metal foil layer 5 is cut out into a plane shape corresponding to the plane shape of the peripheral portion of the cylinder hole 3d of the sub-plate as shown in FIG. 15 (b). thickness 50 J um hardness H v 6 0 more aluminum foil 6 (Nippon Light Metal Co., Ltd. A3005
- the hot plates across its Fuenonore adhesives It is formed by heating and bonding while pressing with a press or the like.
- the substrate 2 is formed together with the adhesive layer 7 made of phenol adhesive. And extends from a position radially inward from the annular bead 2b to a position radially outward from the annular bead 2b so as to overlap with the annular bead 2b and face the top of the annular bead 2b.
- the hole 3d and thus the corresponding one hole 2a of each cylinder of the substrate 2 are annularly surrounded.
- the metal foil layer 5 made of the aluminum foil 6 adhered to the one side of the sub-plate 3 interposed between the two substrates 2 by the calo-pressure heating is bonded thereto.
- the adhesive layer 7 made of a phenol adhesive which overlaps with each annular bead 2b of the substrate 2 and is located radially inward of the annular bead 2b so as to face the top of the annular bead 2b. Extending from the position to the position radially outward, and surrounding each cylinder hole 2a of the substrate 2 in a ring shape to form a step structure S4 with a step amount of 50 zm (excluding the adhesive layer 7).
- the phenol adhesive forming the adhesive layer 7 adheres the aluminum foil 6 to the sub-plate 3 while being heated and pressed, so that the phenol before curing Pressing the adhesive to flow under the aluminum foil 6 or extruding a part of it from under the aluminum foil 6 facilitates the step structure It is possible to obtain a desired thickness, and easily obtain a step amount that optimizes the balance of the tightening force between the annular bead 2b and the outer bead 2d.
- the metal foil is made of aluminum and has a hardness of Hv 60 or more.
- the aluminum foil 6 has high heat resistance and is damaged. Since it is difficult to form and maintain its shape, the handling of metal foil during molding and bonding can be facilitated.
- a phenol adhesive is used as an adhesive for the adhesive layer ⁇ . Since the phenol adhesive has high heat resistance, the heat resistance of the gasket is maintained high. can do.
- the two substrates 2 are each provided with a rubber coat that covers the outer surface of the steel plate with a rubber layer
- the rubber layers are formed by a cylinder block and a rubber block. Sealing performance can be improved by filling the micro scratches and processing marks on the deck surface of the cylinder head and performing the function of micro sealing.
- FIG. 16 is a cross-sectional view of the second embodiment of the metal gasket for a cylinder head according to the present invention at the same position as in FIG. 1.
- the metal gasket 1 of the second embodiment has Aluminum foil 6 (A 3005 manufactured by Nippon Light Metal Co., Ltd.) with a thickness of 25 ⁇ is bonded on both sides of
- the only difference from the first embodiment is that the metal foil layer 5 is provided via the adhesive layer 7 to form a step structure S5 having a step amount of 50 / itn (excluding the adhesive layer 7). Otherwise, the configuration is the same as that of the first embodiment. According to the second embodiment, the same operation and effect as those of the first embodiment can be obtained.
- the adhesive is a phenol adhesive, and the metal having a thickness of 50 / zm is used.
- the metal foil 6 of the foil layer 5 is made of steel (SPCC) and stainless steel (SUS304) having a hardness of Hv 60 or more, respectively.
- the third embodiment is a fourth embodiment. According to the third and fourth embodiments, as described later, the same high sealing performance as in the previous embodiment can be exhibited.
- the same structure as that of the first embodiment having the adhesive layer 7 and the metal foil layer 5 on one side of the flat sub-plate 3 is used.
- the adhesive is a phenol adhesive and the thickness of the metal is 50 / m.
- the metal foil 6 of the foil layer 5 is made of brass and titanium having a hardness of Hv 60 or more, respectively, according to the fifth and sixth embodiments of the metal gasket for a cylinder head according to the present invention. I do. According to the fifth and sixth embodiments, as described later, the same high sealing performance as the previous embodiment can be exhibited.
- the metal box 6 of the 50 ⁇ m-thick metal foil layer 5 has a hardness similar to that of the first embodiment having the adhesive layer 7 and the metal foil layer 5 on one side of the flat sub-plate 3.
- FIG. 17 is a cross-sectional view of the ninth embodiment of the metal gasket for a cylinder head according to the present invention at the same position as in FIG. 1.
- the metal gasket 1 of the ninth embodiment has In addition, an annular bead 3f having a chevron-shaped cross section is formed so that the annular bead 2b of the substrate 2 overlaps and the top of the annular bead 2b of the lower substrate 2 is opposed to the annular bead 2b.
- a 50 ⁇ m thick metal foil layer on one side of sub-plate 3 by heating and bonding 50 ⁇ m thick aluminum foil 6 with phenol adhesive between them 5 is provided via the adhesive layer 7 to form a step structure S6 having a step amount of 50 m (excluding the adhesive layer 7), which is different from the first embodiment.
- the configuration is the same as that of the embodiment. According to the ninth embodiment, since the annular beads 2b and 3f overlap in three stages, higher sealing performance can be obtained as compared with the first embodiment as described later.
- FIG. 18 shows a tenth embodiment of the metal gasket for a cylinder head according to the present invention.
- FIG. 2 is a cross-sectional view at the same position as FIG. 1.
- the metal gasket 1 of the tenth embodiment does not include the sub-plate 3 between the two substrates 2, but each substrate 2 itself is the same as the previous embodiment.
- a metal foil layer 5 having a thickness of 50 m is formed on one side (upper side in the figure) of the substrate 2 on the surface (inner side) facing the other substrate (lower side in the figure) 2 with an adhesive.
- the metal foil layer 5 has a thickness of 50 ⁇ which is cut out into a plane shape corresponding to the plane shape of the periphery of the cylinder hole 2 a of the substrate 2, and 2 is formed by sandwiching a polyimide film as an adhesive on one surface (the surface on the protruding side of the annular bead 3 ⁇ 4) and applying heat while applying pressure.
- the polyimide Along with the adhesive layer 7 made of a film, it overlaps with each annular bead 2b of the other substrate 2 and faces radially inward from the annular bead 2b so as to face the top of the annular bead 2b.
- one hole 2a in each cylinder of substrate 2 Are annularly surrounded to form a step structure S7 having a step amount of 50 ra.
- the gasket can be manufactured at low cost because there is no sub plate 3, and as described later, it is possible to obtain substantially the same sealing performance as that of the first embodiment. it can.
- Table 1 below shows the structure of the metal gaskets of the first to tenth embodiments and the metal gasket of the comparative example in which the metal foil layer 5 and the adhesive layer 7 were omitted from the first embodiment.
- the sealing performance here is shown by comparing the metal gasket 1 with the cylinder head SB of the car engine and the cylinder head SH as shown in FIG.
- the heat deterioration temperature in the oven was 200
- a 400-hour heat deterioration test was performed at 400 ° C and a deterioration time of 400 hours.
- Air was injected into the cylinder bore from the spark plug hole in a room temperature atmosphere at the initial stage before and after the heat deterioration test. Shows the result of measuring the limit seal pressure by pressurizing the inside t
- FIG. 19 shows the heat of Comparative Example 1 which is the same as the above-mentioned first embodiment, the comparative example which is the same as the above-mentioned comparative example, and the comparative examples 2 to 4 which have the same structure as the above-mentioned first embodiment but differ only in the material of the metal foil layer 5.
- FIG. 3 is an explanatory diagram showing a comparison of sealing performance after thermal degradation at a degradation temperature of 200 ° C. and a degradation time of 400 hours. From FIG.
- the metal gasket of the above embodiment using the aluminum foil 6 for the metal foil layer 5 uses Comparative Example 2 in which copper foil is used for the metal foil layer 5 and uses the magnesium foil for the metal foil layer 5 Compared with Comparative Example 3 and Comparative Example 4 using silver foil for the metal foil layer 5, it can be seen that the heat resistance is significantly higher.
- FIG. 1 is a plan view showing an entire embodiment of a metal gasket for a cylinder head according to the present invention.
- FIGS. 20 (a) and (b) show a single substrate
- FIG. 21 is a cross-sectional view taken along line B-B
- FIG. 21 is an enlarged cross-sectional view showing the substrate and the soft surface metal plating layer of the metal gasket of the above embodiment. 31 are denoted by the same reference numerals. That is, reference numeral 1 denotes a metal gasket, and 2 denotes a substrate.
- the cylinder-to-cylinder metal gasket 1 of the above embodiment comprises two substrates 2 each made of a steel plate (SUS 301H 0.2t) without rubber coating and superposed on each other. Steel coated without rubber coating
- each of the two substrates 2 has a plurality of cylinders formed respectively corresponding to a plurality of cylinder pores of a cylinder block of an internal combustion engine.
- the sub-plate 3 here has an outer shape corresponding to the substrate 2, and has a cylinder hole 3 d corresponding to each cylinder hole 2 a of the substrate 2 and some of the cooling water holes 2 c of the substrate 2. And a cooling water hole 3e corresponding to.
- the metal gasket 1 for a cylinder head according to this embodiment further includes a soft surface metal having a thickness of not less than 3 ⁇ and not more than 40 / i ra covering both surfaces of the two substrates 2.
- the soft surface metal plating layer 7 is formed on both surfaces of the substrate 2 by, for example, an electroplating process or a molten metal plating process. It consists of one layer of tin, copper, silver or their alloys and has a surface hardness of Hv 60 or less.
- the soft surface metal plating layer 7 formed on both surfaces of the two substrates 2 and covering the entire surface of each surface is used as a surface sealing layer as a cylinder block and It fills the small scratches and processing marks on the deck surface of the cylinder head and performs the function of the nozzle opening, so it can exhibit high sealing performance.
- the soft surface metal coating layer 7 is made of metal, high heat resistance can be exhibited particularly in the annular bead 2b around the cylinder hole 2a exposed to high heat.
- the soft surface metal plating layer 7 is made of tin, copper, silver, or an alloy thereof, and has a surface hardness of Hv 60 or less. Easily fills fine scratches and processing marks on the surface, and achieves high sealing performance You can conduct.
- FIG. 22 is an enlarged sectional view showing a substrate and a soft metal plating layer in another embodiment of the metal gasket of the present invention.
- each soft surface metal plating layer 7 It is different from the previous embodiment only in that it is composed of two layers of a base layer 7a and a surface layer 7b in order from the side close to the substrate 2, and the surface hardness of the surface layer 7b is Hv 60 or less. Is configured similarly to the previous embodiment.
- the soft surface metal plating layer 7 is composed of the two layers of the base layer 7a and the surface layer 7b. Since it is sufficient to use a soft metal for the surface layer 7b, it is possible to select a material having good adhesion to the substrate 2 even if the base layer metal is high in hardness. 1 can increase the durability.
- FIGS. 23 (a) and 23 (b) are a plan view and a half sectional view showing the shape and dimensions of the gasket test piece
- FIG. 24 is a sectional view showing an outline of the seal test apparatus.
- a metal sheet 8 was provided with a surface coating layer 9 on both sides, and a full bead 10a was formed on the gasket with an outer diameter of 75 mm, an inner diameter of 65 mm, and a bead center diameter of 70 strokes.
- a test piece as shown in Fig.
- the gasket 10 was sandwiched between the upper flange 11a made of aluminum alloy and the lower flange lib of the seal test device 11, and a strain gauge (not shown) was attached.
- the limit seal pressure is measured by fastening with a fastening port lid fitted with a sealing washer 11c and introducing high-pressure air into the inside from the pressurized passage lie in the submerged state to check for leaks.
- the test conditions were concluded linear pressure: 40N / mm, the fastening force: 8 7 96N, fastening bolts: M10 flange Material: A5000 series, flange OD: 75mm, each flange height: 50mm, roughness free: 9.7 / m iRmax), pressure detection medium: air, test temperature: room temperature.
- Fig. 25 shows specimens 1 to 3 in which the metal coating material of the surface coating layer 9 of the gasket 10 was tin (Sii), copper (Cu), and silver (Ag), respectively, as shown in Table 1 below.
- Table 1 shows the results of the above-described sealing test performed on Comparative Example 1 in which the surface coating layer 9 of the gasket 10 was eliminated, and as shown in the figure, all the specimens were extremely high compared to Comparative Example 1.
- Specimen 1 plated with tin having the lowest hardness has the highest critical sealing pressure.
- Each “specimen”, including the following, satisfies the conditions for the soft surface metal-plated layer 7 in the above example.
- Fig. 26 shows specimens 1 to 8 in which the metal coating material of the surface coating layer 9 of the gasket 10 was tin (Sn) and the thickness was varied. (Shown by ⁇ ⁇ in the figure) and Comparative Example 1 (shown by ⁇ in the figure) in which the surface coating layer 9 of the gasket 10 was removed shows the results of the above-described sealing test. It can be seen that when the thickness of the plating layer (film) is 3 m or more, the sealing property is improved, and when the thickness exceeds 40 m, the surface is almost flat.
- FIG. 27 is a cross-sectional view showing the outline of the method of the thermal degradation test.
- the above-described gasket 10 was used as a test piece, and the gasket 10 was used as a seal test apparatus as shown in FIG.
- the seal test device 11 In a state sandwiched between the upper flange 11a and the lower flange lib made of aluminum alloy, the seal test device 11 is placed on the table 12 in the heating oven 15, and the seal test device 11 is placed in a high temperature environment of 200 ° C.
- a fluctuating compressive load is applied to the seal test device 11 via the centering steel ball 13 with the compression flange 14 and the critical seal pressure before and after the thermal deterioration test is measured.
- the thermal degradation test conditions were as follows: temperature: 200 ° C, Max. Compressive load: 87% N, Min. Compressive load: 4398 N, fluctuating frequency: 20 Hz (Sin waveform), number of attached cycles: 5 X 106 times Yes, the method and conditions for the seal test are the same as
- Figure 28 shows specimens 1 and 2 in which the metal coating material of the surface coating layer 9 of the gasket 10 was tin (Sn) and copper (Cu), as shown in Table 3 below.
- Table 3 The results of the above thermal degradation test and the seal test before and after the comparative example 1 in which the surface coating layer 9 of the gasket 10 was eliminated and the comparative example 2 in which the surface coating layer 9 of the gasket 10 was rubber coated are shown.
- the specimens 1 and 2 in which the metal coating material of the surface coating layer 9 was tin (Sn) and copper (Cu) had little deterioration of the surface seal layer due to thermal deterioration. It can be seen that the heat resistance has been improved.
- Table 4 shows that the tin-plated layer was formed to a thickness of 20 / ra on both sides of a 0.2 mm thick SUS301H stainless steel sheet by the electric plating process, and the steel sheet was processed with full beads to form the gasket.
- the test results for the specimen 1 in the same manner as described above are shown. According to the specimen 1, a stable sealing property can be secured both at the initial stage before the thermal degradation test and after the thermal degradation test.
- Table 5 shows that a copper plating layer is formed to a thickness of 30 ⁇ on both sides of a SUS301H stainless steel sheet with a thickness of 0.2 mra by an electric plating process, and that the steel sheet is processed with a full bead to form the gasket 10
- the test results for the specimen 1 in the same manner as described above are shown. According to the specimen 1, a stable sealing property can be secured both at the initial stage before the thermal degradation test and after the thermal degradation test.
- Table 6 shows that a silver-plated layer is formed to a thickness of 15 ⁇ on both sides of a SUS301H stainless steel thin plate with a thickness of 0.2 mm by an electric plating process, and the steel plate is processed with a full bead to form the gasket 10
- the test results for the specimen 1 in the same manner as described above are shown. According to the specimen 1, stable sealing properties can be secured both at the initial stage before the thermal degradation test and after the thermal degradation test.
- Material ⁇ Layer thickness b Material thickness Thickness direction 'Initial heat degradation Specimen 1 Au mess 10 i £ m Electric SUS301H 0.2mtn Full bead 0.25mm 1.75 P a
- Thickness Plating method Material. Thickness Shape ⁇ Initial heat degradation Comparative example 1 Fe length 35 u ra Electricity SUS301H 0.2 Fluid 0.25mm 0.05 pa 0.05 pa Comparative example 2 No surface coating SUS301H 0.2mm Full bead 0.25 Dragon 0.15 pa 0.20 pa Comparative Example 3 Rubber Co. ⁇ Nog ii m SUS301H 0. in Full Bead 0.25mra 3.5 pa 0.95Mpa
- Table 9 shows that a zinc (Zn) -plated layer is formed to a thickness of 15 m on both sides of a 0.2 mm thick SUSSOIH stainless steel sheet by an electroplating process, and the steel sheet is subjected to full beading.
- the test results of Comparative Example 1 similar to Example 10 are shown. In Comparative Example 1, too, the surface hardness of the plating layer was too high, so that a sufficient sealing effect could not be obtained, and it was possible to secure a good see-through property. Can not.
- Table 11 shows that a layer of copper-silver (Cu-Ag5%) alloy was formed on both sides of a 0.2 mm thick SUS301H stainless steel sheet by a molten metal plating process to a thickness of 30 ⁇ ra.
- the test results for Specimen 1 obtained by processing full bead on a steel plate and making it the same as gasket 10 above are shown. According to Specimen 1, stable sealing performance was obtained both before the initial stage of the thermal degradation test and after the thermal degradation test. Can be secured.
- Table 13 shows that both sides of a 0.2 mm thick SUS301H stainless steel sheet were subjected to an electroplating process by first forming a copper-plated layer as a base layer to a thickness of 15111, and the surface on top of it. As a layer, a silver-plated layer was formed to a thickness of 10 zm, and a test result was obtained for a specimen 1 in which a full bead was added to the steel sheet and which was the same as the gasket 10 described above. Stable sealing performance can be ensured both before the heat deterioration test and after the heat deterioration test.
- Table 15 shows that a tin-plated layer with a thickness of 25 ⁇ was formed on both sides of a 0.25 mm thick SUS301H stainless steel sheet by an electric plating process, and that the steel sheet was processed with a half bead to form a gasket 10
- the test results for the same specimen 1 are shown. According to the specimen 1, stable sealing performance can be ensured both at the initial stage before the thermal degradation test and after the thermal degradation test.
- Table 16 shows that the tin-plated layer is formed to a thickness of 25 ⁇ on both sides of a 0.2 mm thick SUS304 stainless steel sheet by the electroplating process, and the steel sheet is processed with full beads to form the gasket.
- the test results for Specimen 1 similar to 10 are shown. According to Specimen 1, stable sealing properties can be secured both at the initial stage before the thermal degradation test and after the thermal degradation test.
- Table 17 shows that a tin-plated layer is formed on both sides of a 0.2 mm thick SPCC thin steel plate by electroplating to a thickness of 25 / ⁇ m, and then the steel plate is processed with full beads to form the gasket.
- the test results for the specimen 1 in the same manner as above are shown. According to the specimen 1, stable sealing performance can be secured both at the initial stage before the thermal degradation test and after the thermal degradation test.
- the metal gasket of each of the above-described embodiments having the same soft metal-plated layer 7 as the above-described specimen can exhibit high sealing properties and high heat resistance.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Gasket Seals (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/550,010 US20060232017A1 (en) | 2003-03-17 | 2004-03-17 | Metal gasket for cylinder head |
EP04721372A EP1607662B1 (en) | 2003-03-17 | 2004-03-17 | Metal gasket for cylinder head |
DE602004027017T DE602004027017D1 (de) | 2003-03-17 | 2004-03-17 | Metalldichtung für zylinderkopf |
Applications Claiming Priority (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2003072730A JP2004278719A (ja) | 2003-03-17 | 2003-03-17 | シリンダーヘッド用メタルガスケット |
JP2003072638A JP4298335B2 (ja) | 2003-03-17 | 2003-03-17 | シリンダーヘッド用メタルガスケット |
JP2003-072730 | 2003-03-17 | ||
JP2003072547A JP2004278710A (ja) | 2003-03-17 | 2003-03-17 | シリンダーヘッド用メタルガスケット |
JP2003-072547 | 2003-03-17 | ||
JP2003-072638 | 2003-03-17 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2004083690A1 true WO2004083690A1 (ja) | 2004-09-30 |
Family
ID=33033076
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2004/003609 WO2004083690A1 (ja) | 2003-03-17 | 2004-03-17 | シリンダーヘッド用メタルガスケット |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP1607662B1 (ja) |
DE (1) | DE602004027017D1 (ja) |
WO (1) | WO2004083690A1 (ja) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102014109937A1 (de) * | 2014-07-15 | 2016-01-21 | Elringklinger Ag | Zwischenplatte und Steuereinheit für fluidbetriebene Verbraucher |
Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6396360A (ja) * | 1986-10-14 | 1988-04-27 | Yamaha Corp | 金属ガスケツト |
JPH0238760A (ja) | 1988-07-28 | 1990-02-08 | Sanshin Kogyo Kk | ラバーコートメタルの製造方法 |
JPH0517737A (ja) | 1991-07-10 | 1993-01-26 | Hitachi Chem Co Ltd | 金属基板黒鉛質ガスケツト |
JPH05223173A (ja) * | 1992-02-12 | 1993-08-31 | Watanabegiichi Seisakusho:Kk | パッキン |
JPH07229564A (ja) * | 1994-02-17 | 1995-08-29 | Nippon Reinz Co Ltd | シリンダヘッド用金属ガスケット |
JPH08178071A (ja) * | 1994-12-21 | 1996-07-12 | Nippon Reinz Co Ltd | メタルシリンダヘッドガスケット |
JPH08285081A (ja) * | 1995-04-17 | 1996-11-01 | Nippon Gasket Co Ltd | 金属製ガスケット |
JPH09166219A (ja) * | 1995-12-14 | 1997-06-24 | Best:Kk | 金属ガスケット及びその製造方法 |
JPH11159623A (ja) * | 1997-12-01 | 1999-06-15 | Ket & Ket:Kk | 金属ガスケット |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB931710A (en) * | 1959-05-22 | 1963-07-17 | Corp Packing & Sheet Metal Com | Improvements in or relating to gaskets |
JPH06129540A (ja) * | 1992-10-19 | 1994-05-10 | Ishino Corp:Kk | 金属ガスケット |
-
2004
- 2004-03-17 EP EP04721372A patent/EP1607662B1/en not_active Expired - Lifetime
- 2004-03-17 DE DE602004027017T patent/DE602004027017D1/de not_active Expired - Lifetime
- 2004-03-17 WO PCT/JP2004/003609 patent/WO2004083690A1/ja active Application Filing
Patent Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6396360A (ja) * | 1986-10-14 | 1988-04-27 | Yamaha Corp | 金属ガスケツト |
JPH0238760A (ja) | 1988-07-28 | 1990-02-08 | Sanshin Kogyo Kk | ラバーコートメタルの製造方法 |
JPH0517737A (ja) | 1991-07-10 | 1993-01-26 | Hitachi Chem Co Ltd | 金属基板黒鉛質ガスケツト |
JPH05223173A (ja) * | 1992-02-12 | 1993-08-31 | Watanabegiichi Seisakusho:Kk | パッキン |
JPH07229564A (ja) * | 1994-02-17 | 1995-08-29 | Nippon Reinz Co Ltd | シリンダヘッド用金属ガスケット |
JPH08178071A (ja) * | 1994-12-21 | 1996-07-12 | Nippon Reinz Co Ltd | メタルシリンダヘッドガスケット |
JPH08285081A (ja) * | 1995-04-17 | 1996-11-01 | Nippon Gasket Co Ltd | 金属製ガスケット |
JPH09166219A (ja) * | 1995-12-14 | 1997-06-24 | Best:Kk | 金属ガスケット及びその製造方法 |
JPH11159623A (ja) * | 1997-12-01 | 1999-06-15 | Ket & Ket:Kk | 金属ガスケット |
Non-Patent Citations (1)
Title |
---|
See also references of EP1607662A4 * |
Also Published As
Publication number | Publication date |
---|---|
DE602004027017D1 (de) | 2010-06-17 |
EP1607662A4 (en) | 2007-05-02 |
EP1607662A1 (en) | 2005-12-21 |
EP1607662B1 (en) | 2010-05-05 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP2004278719A (ja) | シリンダーヘッド用メタルガスケット | |
CN1894526A (zh) | 故障保险气动致动阀 | |
KR101221254B1 (ko) | 가스켓 | |
JP4570897B2 (ja) | フランジ継手用ガスケット | |
US7665741B2 (en) | Laminate-type gasket | |
US6139024A (en) | Cylinder head gasket | |
KR20100082857A (ko) | 가스켓 | |
KR20060129334A (ko) | 레이저 용접된 다층식 강철 가스켓 조립체 | |
WO2004083690A1 (ja) | シリンダーヘッド用メタルガスケット | |
US8349469B2 (en) | Composite article made by process for joining stainless steel part and silicon carbide ceramic part | |
US8268454B2 (en) | Composite articles made by process for joining stainless steel part and zirconia ceramic part | |
JP4859356B2 (ja) | メタルガスケットの製造方法 | |
CA2234528A1 (en) | Galling resistant gasket | |
US8426032B2 (en) | Composite articles made by process for joining stainless steel part and silicon carbide ceramic part | |
US8361634B2 (en) | Composite articles made by process for joining bronze part and silicon carbide ceramic part | |
JP2941382B2 (ja) | セラミックス―金属接合体及びその製造方法 | |
KR20170000076U (ko) | 멀티 캠프로파일 가스켓 | |
JPH0236291A (ja) | ヘッドガスケット | |
JPH1163228A (ja) | 金属ガスケット | |
US8372522B2 (en) | Composite articles made by process for joining brass part and silicon carbide ceramic part | |
JPH07229564A (ja) | シリンダヘッド用金属ガスケット | |
US8247081B2 (en) | Composite articles made by process for joining stainless steel part and titanium carbide ceramic part | |
JP2004278710A (ja) | シリンダーヘッド用メタルガスケット | |
US20080138694A1 (en) | High-Temperature Fuel Cell System | |
US8252429B2 (en) | Composite articles made by process for joining stainless steel part and zirconia ceramic part |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AK | Designated states |
Kind code of ref document: A1 Designated state(s): AE AG AL AM AT AU AZ BA BB BG BR BW BY BZ CA CH CN CO CR CU CZ DE DK DM DZ EC EE EG ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX MZ NA NI NO NZ OM PG PH PL PT RO RU SC SD SE SG SK SL SY TJ TM TN TR TT TZ UA UG US UZ VC VN YU ZA ZM ZW |
|
AL | Designated countries for regional patents |
Kind code of ref document: A1 Designated state(s): BW GH GM KE LS MW MZ SD SL SZ TZ UG ZM ZW AM AZ BY KG KZ MD RU TJ TM AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LU MC NL PL PT RO SE SI SK TR BF BJ CF CG CI CM GA GN GQ GW ML MR NE SN TD TG |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
WWE | Wipo information: entry into national phase |
Ref document number: 2004721372 Country of ref document: EP |
|
WWP | Wipo information: published in national office |
Ref document number: 2004721372 Country of ref document: EP |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2006232017 Country of ref document: US Ref document number: 10550010 Country of ref document: US |
|
WWP | Wipo information: published in national office |
Ref document number: 10550010 Country of ref document: US |